Abstract

One recently synthesized fluorinated ferroelectric liquid crystal ((S)-(+)-4-[(3-tridecafluoroheptanoyloxy)prop-1-oxy]biphenyl-4-yl 4-(1-methylheptyloxy) benzoate (6F3R) has been characterized by frequency dependent dielectric study. The sample exhibits only SmC* phase over a wide temperature range. Two distinct relaxation phenomenon have been observed in its dielectric spectrum and are identified as goldstone mode (GM) relaxation and Maxwell Wagner (MW) relaxation. In most reported works, the MW mode, which is mainly observed for highly conducting liquid crystals, had been reported to be overlapped by the conductivity contribution. But in the present sample we have found distinct and strong MW peaks along with GM mode peaks. However, no soft mode relaxation was observed. Moreover, the sample shows very low response time (μs range) and moderate value of optical tilt angle which are promising criteria for display applications.

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